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Heat conductive silicone grease composition

A technology of thermal conductive silicone grease and composition, which is applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of difficult thermal conductivity, little research and improvement of powder fillers, etc., and achieve high bonding strength and good thermal conductivity. conduction and flow properties, enhance the effect of wettability

Active Publication Date: 2008-10-29
SHENZHEN BORNSUN INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the method of increasing the thermal conductivity by increasing the solid content has almost come to an end. On this basis, it is also very difficult to increase the thermal conductivity by 0.5W / m·K
[0005] The existing thermal conductive silicone grease pays more attention to the modification and optimization of organic components in the design process, but little research and improvement on the powder filler itself

Method used

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  • Heat conductive silicone grease composition
  • Heat conductive silicone grease composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0039] The preparation of embodiment 1~4 heat-conducting silicone grease composition

[0040] (1) At first prepare or buy following various components on the market:

[0041] (A) Silicone oil

[0042] A1: Dimethyl silicone oil, A2: Hydrogen silicone oil, A3: Benzyl silicone oil;

[0043] (B) Siloxane coupling agent KH570

[0044] (C) Thermally conductive filler

[0045] C1: Aluminum powder (average particle size 15μm)

[0046] C2: Aluminum powder (average particle size 5μm)

[0047] C3: Aluminum powder (average particle size 1μm)

[0048] C4: copper powder (average particle size 3μm)

[0049] C5: Zinc oxide powder (average particle size 0.5μm)

[0050] C6: Silicon nitride powder (average particle size 10μm)

[0051] C7: Boron nitride powder (average particle size 1μm)

[0052] C8: aluminum nitride powder (average particle size 5μm)

[0053]Put the above-mentioned aluminum powder, copper powder, etc. in the reaction kettle, and thermally oxidize it in an air atmospher...

experiment Embodiment 1

[0058] Experimental Example 1 Viscosity Test of Thermally Conductive Silicone Grease Composition

[0059] The thermally conductive silicone grease compositions prepared in Preparation Examples 1-4 were used to measure the viscosity at a rotational speed of 10 rpm with a rotational viscometer (NDJ-1B, Shanghai Changji Geological Instrument Co., Ltd.). The results (see Table 2) show that the viscosity of the present invention is slightly higher, but does not affect the operability of the coating process, and can help the bonding between the interfaces.

experiment Embodiment 2

[0060] Experimental Example 2 Thermal Conductivity Test of Thermally Conductive Silicone Grease Composition

[0061] Apply the thermally conductive silicone grease composition prepared in Preparation Examples 1 to 4 to the test bench of a BN-TC120 thermal conductivity tester (manufactured by Foxconn) with screen printing, and the thickness is controlled to be 0.075mm, and the thermal conductivity of the composition is measured. rate value. The result (see table 2) shows that on the same test platform, the thermal conductivity of the present invention is significantly better than that of the comparative example, wherein the thermal conductive silicone grease composition not only has the same properties as that of the insulating powder used in embodiments 3 and 4 Commercially available thermal grease has comparable thermal conductivity and can be used in occasions with high insulation requirements.

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Abstract

The invention discloses a heat-conducting silicone grease composition which mainly consists of organic silicone oil, a silicane coupling agent and heat-conducting powder, wherein the silicane coupling agent covers the surface of the heat-conducting powder; the heat-conducting powder is prepared from powders with larger, intermediate and small diameters; and the concerned metal powder is subjected to heat treatment to form an oxide film on the surface of the metal powder. The heat-conducting silicone grease composition has high heat conductivity and good fluidity; secondarily, the heat-conducting silicone grease composition has high temperature resistance and can keep good heat conductivity and fluidity at 250 DEG C; additionally, the heat-conducting silicone grease composition requires no refrigeration and has the advantages of simplified storage and operation flows and high reliability.

Description

technical field [0001] The invention relates to a high-temperature-resistant heat-conducting silicone grease composition. Background technique [0002] With the continuous increase of power consumption and power density of microelectronics technology, heat dissipation has become the key to the progress of PCB board technology. The operating temperature of a single electronic component increases by 10°C, and the reliability is reduced by 50%. CPU failure due to overheating accounts for CPU failure The proportion of the total is 55%. As a result, many heat dissipation technologies and heat dissipation materials have been developed. Among them, thermal interface materials have been widely used because they can effectively reduce the interface thermal resistance between heat sources and heat sinks, and many varieties have been derived. Thermal grease is one of them. According to different application environments, silicone grease is divided into conductive and thermal conducti...

Claims

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Application Information

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IPC IPC(8): C09K5/14C08L83/04C08K9/02
Inventor 陈克新祝渊王勇任克刚
Owner SHENZHEN BORNSUN INDAL
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